 Conducted comprehensive testing of a large-scale web application, enhancing functionality, performance, and reliability, which led to a 25% reduction in user-reported issues. Identified and resolved over 150 critical issues, ensuring the maintenance of high-quality standards. Liaised directly with clients to gather requirements, provide technical support, and ensure a 90% customer satisfaction rate. Spearheaded the planning and enhancement of new and existing functionalities, optimizing user benefits and increasing user engagement. Collaborated with cross-functional teams, including design, development, and customer success, to identify and implement strategic improvements, resulting in a 30% increase in project efficiency. Progressed from an intern to a full-time Multimedia Developer, eventually supervising a team of 5, demonstrating significant growth and dedication through continuous learning and impactful contributions.